BoilerFaultCodesYour boiler thinks it sees a flame even though it hasn't started the ignition process yet, which is causing it to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: false flame
What causes this fault?
This fault occurs when the boiler's sensors detect an electrical current that mimics a flame, even though the gas hasn't been turned on yet. This is usually caused by a dirty or damaged detection probe sending a false signal, or a fault within the main control board that misinterprets electrical background noise as a fire.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like 15 — no call-out fees, no surprises.
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